1300 An Unusual Presentation of Gastric GIST With Double Duct Sign

Abstract Background Gastrointestinal Stromal Tumour (GIST) most commonly arises from the stomach or small intestine, and presents with mass effect gastrointestinal bleeding. In this unusual case, imaging demonstrated a double duct sign prompting pancreatic MDT referral. Case Presentation A 65-year-old gentleman background of rheumatoid arthritis COPD reported 2-month history anorexia one stone weight loss during rheumatology clinic follow-up. He was found to be anaemic but markers for his showed disease well controlled performed exclude malignancy. CT Thorax, Abdomen Pelvis revealed lung opacification, suggesting cancer metastasis. immediately referred Multi-Disciplinary Team underwent an Endoscopic Ultrasound which 12cm cyst extending pelvis gastric body. Biopsy confirmed that large thick-walled (GIST). Staging PET scan negative metastatic disease. laparotomy GIST excision cuff normal removed. Post-operatively, recovery prolonged due exacerbation however he eventually recovered discharged on day 11. There were no other post operative complications. Conclusions are rare tumours, making up less than 1% all tumour. Patients GISTs primary localised can achieve curative outcome through surgery alone. The prognosis tumours is favourable, 5-year survival rates at 83%. This case demonstrates value pre-operative endoscopic ultrasound.